The manner of the offence is not yet known with Scottish Rugby releasing a statement saying only that he was "disciplined for a breach of team protocol".
Just a couple of hours after the decision was announced, Russell likes three tweets in quick succession.
The first two came from Racing 92 team-mate Simon Zebo. The Irish winger of French Martinique descent posted a .GIF which read "It wasn't me" and tagged the Scottish international.
He then followed it up with another saying: "Long Live white chocolate."
The most telling, perhaps, came from user @bruce_1314, who tagged Russell to tell him: "Nothing wrong with standing up for yourself."
Russell has made 46 appearances for his country.